Heating System Professionals Servicing DE, MD, & PA

Hillside is here to help—from selection and purchase, to delivery, installation, and service, we’ll make sure your paws are comfy all year long.

Our professional staff is fully trained to install, maintain, and repair oil, natural gas, propane gas, and electric heating systems. This includes hot air, hot water, boiler, heat pump, and water heaters (both traditional tank and modern tankless on-demand water heaters). We’ve been successfully installing central heating solutions for over 65 years.

Hillside is capable of removal and replacement of fuel oil tanks, both steel as well as modern Roth double-wall tanks.

We carry and service most name brand equipment including but not limited to: Armstrong Air, Thermo Pride, Peerless Boiler, Mitsubishi and other ductless systems, Rinnai Tankless Water Heaters, Honeywell, Aprilaire, and Roth fuel oil tanks.

Our services extend to all types of indoor air quality, humidifiers, humidification, air cleaners, dehumidifiers. No matter your budget, Hillside has options ranging from economy to high efficiency.

Hillside is proud to sell and install all lines of new, modern, and remotely accessible thermostats made by Honeywell—controlling your thermostat from anywhere! Connect from smartphones or computers to manage temperatures according to your schedule.

New Furnace Sales & Installation

If you need a new furnace in New Castle County, DE, Cecil County, MD, or Southern Chester County, PA, Hillside Heating & Cooling will guide you through the sales and installation process. We’ll help you choose the best new heating system for your heating needs. Our heating systems are built for efficiency and performance delivering dependable warmth at a budget-friendly price!

Furnace Repair

If your furnace is sputtering or has come to a complete halt, prevent your indoor temperatures from plummeting by calling Hillside Heating & Cooling. As heating furnace repair specialists serving New Castle County, DE, Cecil County, MD, and Southern Chester County, PA, we want to restore the heat in your home as soon as possible so you can be comfortable again. Contact our friendly customer service representatives to schedule your furnace repair now!

Furnace Cleaning & Maintenance

Regular furnace cleaning and maintenance helps prevent frequent failures, inefficient performance, and poor indoor air quality. Hillside Heating & Cooling is the leading furnace cleaning and maintenance specialists in New Castle County, DE, Cecil County, MD, and Southern Chester County, PA. Schedule our 30-point Furnace Tune-Up designed to prevent heating problems this season.

Boiler Sales, Maintenance, & Repairs

Hillside Heating & Cooling are boiler repair and new boiler installation specialists in New Castle County, DE, Cecil County, MD, and Southern Chester County, PA. Our expert technicians have been trained to repair any boiler regardless of the make and model. If your boiler needs service or you need a new boiler, you can count on Hillside’s heating professionals to do the job and do it right the first time. Contact Hillside, your Boiler Specialist for a free estimate!

Heat Pump Sales & Installation

Are you looking for a way to save on your energy costs all year round? Having Hillside Heating & Cooling add a new heat pump to your heating and air conditioning system is a great way to achieve this goal and so much more! Heat pumps allow you to minimize the use of the central furnace while maintaining comfort within the home, and new heat pump technology delivers a unit that is persistently reliable and exceptionally quiet.

Repair or Replace MY Outdated Heating Equipment?

Your heating in DE, PA, and MD is one of the most important investments and pieces of equipment in your home. We can have brutally cold winters. So, when should I replace my heating system? Let our heating expert explain.

Hillside Maintenance Plans

Hillside Oil Tank Protection and Replacement Warranty

Hillside offers a tank protection program by TANK-GUARD®. This service is a corrosion and protection warranty giving “Peace of Mind” knowing the expense of replacing your heating oil tank will be covered if replacement becomes necessary due to leaks.

Hillside Credit Application

Budget Sign-up Form

Our budget plan stretches annual expenses into monthly payments. We use a simple formula…your annual expense with Hillside divided into the number of months remaining in our budget season. Plans designed specifically for your budget.

Contact Us

This contact form doesn't substitute for an order, fuel delivery, or service call request. Please call our office 302-738-4144 or 410-398-2146.

Why You Can Trust Hillside

★ ★ ★ ★ ★

“I was out of town on vacation last week. My tenant called me and let me know the heat was not working. Since it was very cold, this situation needed to be addressed immediately. I literally called Hillside from a ski lift 2,000 miles away. Your staff was GREAT and the issue was resolved and the heat was back on WITHIN AN HOUR. Now that is some fantastic customer service.”

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The Hillside Maintenance Plans

Keeping Your Paws Comfy All Year Round

The Hillside Maintenance Plans are designed to prevent minor problems from turning into major issues! Extend the life of your equipment, reduce the need for costly repairs, and increase the performance of your heating and cooling systems while lowering your utility bills.

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Hillside Oil Heating & Cooling has been family owned and operated for over 65 years. Three generations of family attitudes and values have allowed us to continue to successfully service our customers and communities. Everything about Hillside is locally owned and operated. We do not answer to any parent or mother corporation in some far-off land. Real human beings still work here and answer our phones. We have no touch-tone mazes to navigate in order to speak to a human being that can assist or answer questions. Customer service is the most important thing. We know what it is like to be a customer and how we like to be treated. We take pride in thinking like a customer when dealing with our customers. Support of Hillside is support for local, homegrown, family business in our area. Thank you from everyone at Hillside for your business. Hillside is a full-service home heating oil company as well as a full-service heating and air conditioning service company. We make daily deliveries of home heating oil, diesel fuels, and gasoline.

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Our customer support team will contact you shortly after filling out this form. You can also call our office 302-738-4144 or 410-398-2146. Thank You.